(Section 3.3, problems 47,49,50,52,54). Section 01 does parts (a) and (b); Section ZG81 does parts (a), (b) and (c).

47. There is a triangle x such that for all circles y, x is above y

49. For every object x, there is an object y such that x = y

and x and y have different colors. 50. For every object x, there is an object y such that if x = y

then x and y have different colors.

52. For all circles x and for all triangles y, x is to the right of y.

54. There is a circle x and there is a triangle y such that x and y have the same color.

.